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headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4789: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4790: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4791: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) UBA - CienciaS • Ver Tema - [Resuelto] P:4 - Ej. 11 de guia1 2do 2007 - Cinemática
Creo que lo resolvieron en clase este cuatrimestre pero no estuve presente. Entiendo que el radio no es constante y que por lo tanto debe haber un componente radial de la velocidad. Las dudas son: ¿Como debo entender el radio R para luego al derivarlo hallar V(t)? y ¿Qué representa x en la figura, lo mismo que el vector PL? .
Acá dejo el enunciado del ejercicio:
11 - Un faro que gira con velocidad angular constante w, proyecta su luz sobre una pantalla ubicada a una distancia d = OP (ver fig.).
a) Halle la velocidad lineal del punto luminoso sobre la pantalla en función de datos y de x. b) Calcule en función de datos y de x la velocidad angular del punto luminoso para un observador situado a una distancia D = AP de la pantalla. (Sugerencia: haga este cálculo usando trigonometría). c) ¿Cómo debería ser la velocidad angular del faro para que el punto luminoso se mueva con velocidad constante?
Saludos!
Adjuntos:
Comentario: Fig. del problema
Dibujo.JPG [ 5.55 KiB | Visto 7372 veces ]
Última edición por rodrigopm el 02 Jul 2009, 01:49, editado 3 veces en total
aca va la resolucion, el movimiento del punto es unidimensional, todo pasa en el plano del dibujo y es esa distancia que pusiste y es lo que tenes que derivara para encontrar la velocidad
asi que mira vos jaja, algun dia me voy a aprender esas identidades trigonometricas, espero que rapido porque siempre traban , me vino barbaro tu respuesta, gracias!
Última edición por rodrigopm el 23 Jun 2009, 00:40, editado 1 vez en total
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